./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
./a.out < wait2.txt &
